PU-Foam Wheel Model: 4.00-8 Good design of patterns;All kinds of bearings,rims and colors; Top quality;Competitive price ModelOuter Dia.(mm)Width(mm)Hub length(mm)Hole Dia.(mm) 16"x4.00-83909014016/18/20/25/35/36/... 1,Good design of tread pattern like smooth pattern,ribbed pattern,knobby pattern,sawtooth pattern,turf pattern,diamond pattern,lug pattern and so on ;2,You can choose the weight and ...